Fbedebick gbinhell



(No Model.) -F. GRINNELL.

' v AUTOMATIG FIRE EXTINGUISHBR. No. 269,198. Patented De0.'19, 1882.

Fig. l

WITNESSESI INVENTORI UNITED STATES PATENT OFFICE.

FREDERICK GRINNELL, OF PROVIDENCE, RHODE ISLAND.

AUTOMATIC FIRE-I-IXTINGUISHER.

SPECIFICATION forming part of Letters Patent No. 269,198, dated December 19, 1882.

Application filed June 13, 1881. (No model.)

To all whom it may concern Be it known that I, FREDERICK GRINNELL, of the city and county ofProvidence, and State of Rhode Island, have invented a new and useful Improvement in Automatic Fire-Extinguishers; and I hereby declare that the followingis a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification.

The present invention has reference to a device secured to the branches of a system of pipes through which water may be forced to extinguish fire; and it consists in a metal head provided with comparatively large holes and a disk secured by a solder made ofa material fusible at a low temperature, surrounded with a cylinder of perforated gauze, or a sheet-metal cylinder, by which the water discharged from the holes is dispersed or deflected so as to fall in a spray on the fire and extend over a large area, as will be more fully set forth hereinafter.

Figure l is a view of an automatic fire-extinguisher provided with outlets and surrounded with a cylinder of finely-perforated gauze. Fig. 2 is a sectional view of the same, showing thesealsecured within theenlargementor head. Fig.3 is a top view of the automatic fire-extinguisher, showing the cross-support for the annular deflector.

1n the drawings,a represents the end of one of the branch pipes of a system of automatic fire-extinguishers provided with ascrew-thread to receive the head I), which is provided with the holes 0 c. The water from the pipes is prevented from entering the head I) by the disk d, secured by a solder fusible at a low temperature, so as to make a watertightjoint.

e is a cylindrical deflector, placed so as to leave an annular space between the outlets c c and the deflector. This deflector may be made of uniform diameter, of funnel-shaped form, or

of a cylindrical form, narrowest opposite the holes ccand enlarging upward as well as downward, so as to spread the water over a large area, but particularly to direct a large portion toward the ceiling of the room in which the same is placed.

Instead of the seal d, some one of the wellknown devices for retaining the water until it is released by the action of heat may be used.

f is a cross-support or bracket secured to the head I) and extending outward to form a support for the annular deflector e. In the drawings, the defiectorcis represented as made from perforated gauze. In a deflector of uniform diameter such a finely-perforated gauze deflector is found to disperse the water in a much finer spray and more uniformly than when an ordinary perforated rose-head sprinkler is used, in which fine holes are made into the head, such fine holes being liable to stop up by dust or impurities in the water, which is not the case with my present distributer, in which few but comparatively large holes are used.

Having thus described my invention, I claim as new and desire to secure byLetters Patent- 1. An automatic fire-extinguisher provided with a seal arranged to be released by the action of heat, a head provided with lateral outlets, and an annular deflector constructed to disperse the water, as and for the purpose described.

2. In an automatic fire extinguisher,the combination, with the supply-pipe a, of the head b, provided with lateral openings 0 c,the seal d, secured by solder, and the annular finelyperforated deflector e, constructed to discharge the water in a divided state over a large area, as described.

FREDERICK GRINNELL.

Witnesses:

J. A. MILLER, Jr., WM. L. COOP. 

